JPS62261810A - Burner - Google Patents

Abstract

PURPOSE:To prevent carbon monoxide and soots from generating and to improve the durability of a combustion cylinder by providing an opening part and a communicating port on the substantially central axis of an air cylinder, a combustion cylinder whose opening part side is low and opposite side is high, an inserting cylinder provided in opposite to the opening part and provided in an inner drum, and a nozzle provided thereon. CONSTITUTION:Air which has been sucked up through a blast fan 63 passes through a blast passage 64 and then is introduced into an air cylinder 54 and ejected through air holes 55A and 55B, forming a swirling flow and being sprayed through a nozzle. Atomized oil and air are mixed with each other and start a pressure type spray combustion by the discharge of an ignition electrode 62. On the opposite side of an opening part 57, a flame is close to the upper end of a combustion cylinder 56, and therefore a flame 66 and a combustion gas 67 flow down along a circulating stream and flows into an evaporating region 65, thus holding a high temperature. Further, since, on the side of the opening 57, the air ejected through the air hole 55B is closer to the upper end of the combustion cylinder 56 than the flame, a premixed gas 68 of air and vaporized gas flows down along a circulating stream, and flows in the evaporating region 65 mainly through the opening 57. Consequently, an oil droplet combustion whose ignition source is falling flame, is not carried out and an excel lent combustion state where carbon monoxide and soots are not produced, is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to combustion devices such as small oil water heaters and oil heaters.

BACKGROUND OF THE INVENTION In a conventional combustion device of this type, as shown in FIG. 4, a combustion chamber 1 was composed of a cylindrical inner shell 2 and a disk-shaped combustion chamber 3. Further, an air hole 5 is opened approximately tangentially on the outer peripheral surface of the air cylinder 4 located approximately in the center of the combustion chamber 1, and a combustion cylinder 6 is provided on the concentric axis of the air cylinder 4.
An opening 7 and a communication port 8 were provided in the opening 7 and the communication port 8. A nozzle adapter 10, a nozzle 11, and an ignition electrode 12 were provided in an insertion tube 9 provided in the inner shell 2 facing the opening 7. Further, the ventilation fan 13 was communicated with the air cylinder 4 via the ventilation path 14.

The air sucked in by the ventilation fan 13 is sent into the air cylinder 4 through the ventilation path 14, and is blown out from the air hole 5.
A swirling flow was formed. At the same time, the atomized oil sprayed from the nozzle 11 was mixed with the air, and the ignition electrode 12 was discharged to start so-called pressure spray combustion. At this time, as the temperature of the combustion chamber 1 rises, a vaporization region 15 is formed between the air cylinder 4 and the combustion cylinder 6, and the atomized oil is vaporized in this vaporization region 15 and rises to the air hole 5. Rapidly mixes with air ejected from the
It was engaged in diffuse combustion that formed a blue flame. moreover,
The combustion gas 16 forms a circulation flow that descends along the inner shell 2 and flows into the vaporization region 13 through the communication port 8, thereby keeping the vaporization region 15 at a high temperature.

Problems to be Solved by the Invention However, in the above configuration, the blue flame is induced by the circulating flow and descends, so the oil droplet combustion 18 that uses this descending flame 17 as an ignition source is caused near the opening 7. This results in
- It had the problem of generating carbon oxide and soot. In addition, since the upper end of the combustion tube 6 on the side of the opening 7 has poor transmission of power to the lower part of the combustion tube 6, the temperature tends to increase, which poses a problem in durability.

The present invention is intended to solve these conventional problems, and aims to prevent the generation of carbon oxides and soot and improve the durability of the combustion tube.

Means for Solving the Problems In order to solve the above-mentioned problems, the combustion device of the present invention includes a combustion chamber consisting of an inner shell and a bottom of the combustion chamber, and a combustion chamber located approximately in the center of the combustion chamber and on the outer peripheral surface. An air cylinder with an air hole, and a combustion cylinder that is located approximately on the center axis of this air cylinder, has an opening and a communication port, and is lower in height on the opening side and higher on the opposite side. and an insertion tube provided in the inner barrel to face the opening, and a nozzle provided in the insertion tube.

Function: With the above-described configuration, the present invention allows air and vaporized gas to descend on the opening side, and blue flame and combustion gas to descend on the opposite side.

Embodiments Hereinafter, embodiments of the present invention will be described based on the accompanying drawings.

In FIG. 1, 51 is a combustion chamber, and a cylindrical inner body 52
and a disk-shaped combustion chamber bottom 53. 54
is a hollow air cylinder with a closed top end, and an air hole 55A that opens in a substantially tangential direction and an air hole 65B that opens in a radial direction are provided on the outer peripheral surface of the cylinder. Reference numeral 56 denotes a cylindrical combustion cylinder, which is provided coaxially with the air cylinder 54, and has an opening 57 and a communication hole 58 in the center and lower part of its peripheral wall. Further, the height of the combustion tube 56 increases from the opening side to the opposite side. 5
Reference numeral 9 denotes an insertion tube, which is provided in the inner body 52 facing the opening 57, and a nozzle adapter 60, a nozzle 61, and an ignition electrode 62 are exposed inside this insertion tube 59. Reference numeral 63 denotes a blowing fan, which is communicated with the air cylinder 54 via a blowing path 64.

In the above configuration, the air sucked in by the blowing fan 63 is sent into the air cylinder 54 through the blowing passage 64, and is ejected from the air holes 55A and 55B, forming a swirling flow. At the same time, the atomized oil sprayed from the nozzle 61 is mixed with the air, and the ignition electrode 62 is discharged to start so-called pressure spray combustion. At this time, as the temperature of the combustion chamber 51 rises, a vaporization region 65 is formed between the air cylinder 54 and the combustion cylinder 56, and this vaporization region 6
In step 5, the atomized oil is vaporized and rapidly mixed with air ejected from air holes 55A and 55B while rising.
Diffusion combustion occurs forming a blue flame.

More specifically, since the flame is close to the upper end of the combustion tube 56 on the opposite side of the opening 57, the flame 66 and the combustion gas 6
7 descends along the circulating flow and flows into the vaporization region 65, keeping this vaporization region 65 at a high temperature. In addition, the opening 57
On the side, the air ejected from the air hole 55B is closer to the upper end of the combustion tube 56 than the flame, so the premixed gas 68 of air and vaporized gas
It descends along the circulation flow and mainly flows into the vaporization region 65 through the opening 57. Therefore, oil droplet combustion using the falling flame as the ignition source does not occur, and as a result, the vaporizing region 65 is kept at a high temperature, carbon monoxide and soot are not generated, and a good combustion state can be obtained.

Furthermore, it is possible to prevent a rise in temperature at the upper end of the combustion tube 56 on the side of the opening 57, and there is an effect that durability can be improved.

Next, another embodiment of the present invention will be described with reference to FIGS. 2 and 3. The difference in FIG. 2 from the previous embodiment is that the height of the combustion tube 56 is increased in stages from the opening 57 side to the opposite side. The difference in FIG. 3 from the previous embodiment is that the height of the combustion tube 56 is increased halfway from the opening side to the opposite side, and is kept at the same height thereafter.

Effects of the Invention As described above, the combustion apparatus of the present invention provides the following effects.

Since the premixed gas of air and vaporized gas is falling on the opening side, oil droplet combustion does not occur, resulting in a good combustion condition in which no carbon oxide or soot is generated. It also prevents the temperature from rising at the upper end of the combustion cylinder, which has the effect of improving durability.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view of a main part of a combustion device in a first embodiment of the present invention, FIG. 2 is a perspective view of a combustion tube in a second embodiment, and FIG. 3 is a combustion tube in a third embodiment. FIG. 4 is a longitudinal sectional view of a main part of a conventional combustion device. 51... Combustion chamber, 52... Inner shell, 53
... Combustion chamber bottom, 54 ... Air cylinder, 55
A, 55B... Air hole, 56... Combustion tube, 57... Opening, 58... Communication port, S9... Insertion. Cylinder, 61... Nozzle.

Claims (1)

[Claims] A combustion chamber composed of an inner shell and a bottom of the combustion chamber, a hollow air cylinder located approximately in the center of this combustion chamber with its upper end closed, an air hole opened on the outer peripheral surface of this air cylinder, and the air cylinder. The combustion tube is located approximately on the concentric axis of the combustion chamber, has an opening and a communication port, and has a lower height on the opening side and a higher height on the opposite side, and a nozzle facing the insertion tube. Combustion device.